/Engine/Source/Editor/AnimationBlueprintLibrary/Public/AnimationBlueprintLibrary.h
Returns true if successfully added, false if it was already existing.
static bool AddCurveInternal ( [UAnimSequence](API\Runtime\Engine\Animation\UAnimSequence) * AnimationSequence, [FName](API\Runtime\Core\UObject\FName) CurveName, int32 CurveFlags, ERawCurveTrackTypes SupportedCurveType )